Key for bicycle handlebar lock



FIG. 1 is a top plan view of a key for bicycle handlebar lock showing my new design;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a bottom plan view;

FIG. 4 is a left side elevational view, from the left in FIG. 1; and,

FIG. 5 is a perspective view thereof. 

The ornamental design for a key for bicycle handlebar lock, as shown. 